activiti-demo/src/main/java/com/example/demo/DemoApplication.java

package com.example.demo;

import lombok.extern.slf4j.Slf4j;
import org.activiti.api.task.runtime.TaskRuntime;
import org.activiti.api.task.runtime.events.TaskAssignedEvent;
import org.activiti.api.task.runtime.events.TaskCompletedEvent;
import org.activiti.api.task.runtime.events.listener.TaskRuntimeEventListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

@Slf4j
@SpringBootApplication(exclude = {org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration.class,
		org.springframework.boot.actuate.autoconfigure.security.servlet.ManagementWebSecurityAutoConfiguration.class})
public class DemoApplication  {

	public static void main(String[] args) {
		SpringApplication.run(DemoApplication.class, args);
	}

	@Autowired
	private TaskRuntime taskRuntime;

	@Bean
	public TaskRuntimeEventListener<TaskAssignedEvent> taskAssignedListener() {
		return taskAssigned -> log.info(">>> Task Assigned: '"
				+ taskAssigned.getEntity().getName() +
				"' We can send a notification to the assginee: " + taskAssigned.getEntity().getAssignee());
	}

	@Bean
	public TaskRuntimeEventListener<TaskCompletedEvent> taskCompletedListener() {
		return taskCompleted -> log.info(">>> Task Completed: '"
				+ taskCompleted.getEntity().getName() +
				"' We can send a notification to the owner: " + taskCompleted.getEntity().getOwner());
	}

}